Traction device.



G. B. BAKER. TRACTION DEVICE. APPLICATION I'ILZGD APR.23, 1910.

1,003,025, Patented Sept. 12, 1911.

Q QEMEQEQ smsnswzo Attorneys iu'ovent toe accumulation oil d 'Pidfltllldlli lllf ELIAS BAKER, 01* REED CI. 15',

MICHIGAN.

'rnss'rlon DEVICE.

io n traction device it parts as hereinafter t Sfflll'lfftl.

The object of the invention is to provide in s ililill'lfill dsrice an endless tread comnoscil of a series of links of peculiar congnrotione and loving their pars so disd as to stand the strains ted. An. ovate rdges with. spaced cl'min is arranged .s and is provided configuration which 1 tho tracks and have portions :julupted to travel upon Tho troz vfl is in close contest. with said. chain at the forward and under iciuon of the frame and fender plates are umunted upon the frame and are adapted to i t.- or other ec tionuble material between thomrts oi :tiou device. in tire accompanying: drawings:--Fir urc 1 a side elevation of a portion of the traction device when. power is employed to operate the 2 a. side elevation of u modified form of the traction device adopted to be used when draft means other than power is emplo ."ed. Fig. 3 is an enlarged transverse sectional view of a portion or the device. t. is a plan view i 2:. link used in the device. Fig. is an cc go view of said link.

frame 1 of the device is provided at its periphery with. a continuous groove 9 having at its opposite sides spaced tracks 3. An endless chain 4 is arranged to move about the periphery of the frame 1 and consists of links 5 ,in which are journuled bolts t. Disks 7 are located at the ends of tho holts 6 and are providcd with ilunncs S which are interposed bctwccn the edges oi the: links and the sides of the tracks 3. The disks 7 are adapted to travel upon the surfaces of the trucks 3. Each linl; of the (:l' sin 4 is prov ded at one end with :1. cross bar 9 and at its other end with s hook 10 and ill:

Sponifiosiion of Letters Patent.

Application filsii April 23, 1910.

rumored Sent]. 12, is.

Serial No. 557,279.

the hook of one link adapted. to engage the cross bar of the next adjacent link sod this moons of connection is continuous throughout the chain. I

A. chain 11 of tread members 12 is an longed to move in close contuct'with the chain 21- at the forward and under portion of the frame 1. The-members 12 are U- shapcd in end elevation and are pivotally connected together by bolts 13. Sleeves 14- aremounted upon the intermediate portions or the bolts and have their ends in Close contact with the inner sides of doe innermost portions of the members 12, as illustrated in Fig. 3 of the drawings. During the time that the ch sin 11 is in contact with the chain 4 the outer portions of the disk 7 lie between the tracks 3 and the inner edges of the bridge members 12 of the chain 11.

In the form of tho invention as illustrated in .2 it will be seen that the tread '11 fits snugly about, the disk 7 throughout. the entire lengtl'i of the chain l, while in the form of the invention as illustrated in Fig. 1 of the drawings, the upper rear portion of the said trend is spaced from the adjacent disk 7Q Fender plates 15 are attached to the; sides of the frame 1 and are provided at their edges with inturned flanges '16 which terminate sdjeccntthe flanges 17 provided at the outer portions of the bridge members 12 of the chain 11. The said plates 15 serve as means for preventing dirt and other foreign. materiel -from entering between the parts of the traction devices.

In the form or the device as shown in Fig. l of the drawings a. block: 18 is mounted upon the frame 1 and arms .19 are mounted upon the said block. A sprocket wheel is journeled between the arms 19 and is adapted to engage the cross bolts or sleeves 14 upon the cross bolts 13 of the tread ll. Tihis form of devict: is adapted to be used whn power is employed for driving; the sprocket wheel 20 and it is nppulrent that as the said wheel 20 rotates the trend ll. will becurricd about the pmiphery of tho trzime l and in crmtuct with the u forward m nd 1 A 1 lou'or pri rlion of the mom l and the disks 7 currivd thorchy. Thus it will be soon that a. single traction device is providsd and as the tread ll passes about the periphory of the frame hc disks 7 and thvir flanges 8 are intcrposcd between the. trawl-1s carried by the frmnc and the chain 4, and between the tion is reduced to a minimum.

Ha vi'ng described the invention what I claim as new and desire to secure by Letters- Patent is A traction device comprising a frame having a track at its periphery, a chain of links surrounding the periphery of the frame,

each link of said chain having at one end a bar and at its other end a hook, the hooks of the links throughout the cha'in'pivoiially receiving the barsof the adjacent links, the

links having at points between their bars and hooks bearings, bolts journaled in said bearings, flanged disks located atthe ends of said bolts and arranged to travel upon the track of the frame, and a chain of tread members arranged to move about said disks. In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

GEORGE ELIAS BAKER.

lVitnesses L. G. HAMMOND, J. N. PARKHURST. 

